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Finding the Fourth Proportional to 712,700.64, 983,491.68 and 390,411.84

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Solution

The fourth proportional to 712,700.64, 983,491.68 and 390,411.84 is: 538,749.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,700.64 : 983,491.68 = 390,411.84 : x
  2. Step 2: Convert to fraction form
    712,700.64/983,491.68 = 390,411.84/x
  3. Step 3: Cross multiply
    712,700.64x = 983,491.68 × 390,411.84
  4. Step 4: Simplify right side
    712,700.64x = 383,966,796,413.49
  5. Step 5: Solve for x
    x = 383,966,796,413.49/712,700.64
  6. Step 6: Final answer
    x = 538,749.06

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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.