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Finding the Fourth Proportional to 999,967.32, 1,379,920.86 and 570,386.52

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Solution

The fourth proportional to 999,967.32, 1,379,920.86 and 570,386.52 is: 787,113.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,967.32 : 1,379,920.86 = 570,386.52 : x
  2. Step 2: Convert to fraction form
    999,967.32/1,379,920.86 = 570,386.52/x
  3. Step 3: Cross multiply
    999,967.32x = 1,379,920.86 × 570,386.52
  4. Step 4: Simplify right side
    999,967.32x = 787,088,257,210.81
  5. Step 5: Solve for x
    x = 787,088,257,210.81/999,967.32
  6. Step 6: Final answer
    x = 787,113.98

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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.