Home / 712,388.07-983,095.52-390,117.87

Finding the Fourth Proportional to 712,388.07, 983,095.52 and 390,117.87

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Solution

The fourth proportional to 712,388.07, 983,095.52 and 390,117.87 is: 538,362.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,388.07 : 983,095.52 = 390,117.87 : x
  2. Step 2: Convert to fraction form
    712,388.07/983,095.52 = 390,117.87/x
  3. Step 3: Cross multiply
    712,388.07x = 983,095.52 × 390,117.87
  4. Step 4: Simplify right side
    712,388.07x = 383,523,128,318.35
  5. Step 5: Solve for x
    x = 383,523,128,318.35/712,388.07
  6. Step 6: Final answer
    x = 538,362.65

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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.