Home / 712,705.07-983,533.19-390,426.63

Finding the Fourth Proportional to 712,705.07, 983,533.19 and 390,426.63

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Solution

The fourth proportional to 712,705.07, 983,533.19 and 390,426.63 is: 538,788.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,705.07 : 983,533.19 = 390,426.63 : x
  2. Step 2: Convert to fraction form
    712,705.07/983,533.19 = 390,426.63/x
  3. Step 3: Cross multiply
    712,705.07x = 983,533.19 × 390,426.63
  4. Step 4: Simplify right side
    712,705.07x = 383,997,543,224.47
  5. Step 5: Solve for x
    x = 383,997,543,224.47/712,705.07
  6. Step 6: Final answer
    x = 538,788.85

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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.