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Finding the Fourth Proportional to 676,710.16, 933,840.36 and 390,276.88

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Solution

The fourth proportional to 676,710.16, 933,840.36 and 390,276.88 is: 538,570.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,710.16 : 933,840.36 = 390,276.88 : x
  2. Step 2: Convert to fraction form
    676,710.16/933,840.36 = 390,276.88/x
  3. Step 3: Cross multiply
    676,710.16x = 933,840.36 × 390,276.88
  4. Step 4: Simplify right side
    676,710.16x = 364,456,302,118.88
  5. Step 5: Solve for x
    x = 364,456,302,118.88/676,710.16
  6. Step 6: Final answer
    x = 538,570.76

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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.