Home / 712,316.57-983,007.71-390,056.65

Finding the Fourth Proportional to 712,316.57, 983,007.71 and 390,056.65

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Solution

The fourth proportional to 712,316.57, 983,007.71 and 390,056.65 is: 538,284.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,316.57 : 983,007.71 = 390,056.65 : x
  2. Step 2: Convert to fraction form
    712,316.57/983,007.71 = 390,056.65/x
  3. Step 3: Cross multiply
    712,316.57x = 983,007.71 × 390,056.65
  4. Step 4: Simplify right side
    712,316.57x = 383,428,696,037.26
  5. Step 5: Solve for x
    x = 383,428,696,037.26/712,316.57
  6. Step 6: Final answer
    x = 538,284.12

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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.