Home / 708,467,146.32-977,691,025.80-390,941,515.20

Finding the Fourth Proportional to 708,467,146.32, 977,691,025.80 and 390,941,515.20

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Solution

The fourth proportional to 708,467,146.32, 977,691,025.80 and 390,941,515.20 is: 539,502,802.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,467,146.32 : 977,691,025.80 = 390,941,515.20 : x
  2. Step 2: Convert to fraction form
    708,467,146.32/977,691,025.80 = 390,941,515.20/x
  3. Step 3: Cross multiply
    708,467,146.32x = 977,691,025.80 × 390,941,515.20
  4. Step 4: Simplify right side
    708,467,146.32x = 382,220,011,023,694,272
  5. Step 5: Solve for x
    x = 382,220,011,023,694,272/708,467,146.32
  6. Step 6: Final answer
    x = 539,502,802.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.