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Finding the Fourth Proportional to 658,317.84, 908,460 and 390,045.84

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Solution

The fourth proportional to 658,317.84, 908,460 and 390,045.84 is: 538,252.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,317.84 : 908,460 = 390,045.84 : x
  2. Step 2: Convert to fraction form
    658,317.84/908,460 = 390,045.84/x
  3. Step 3: Cross multiply
    658,317.84x = 908,460 × 390,045.84
  4. Step 4: Simplify right side
    658,317.84x = 354,341,043,806.40
  5. Step 5: Solve for x
    x = 354,341,043,806.40/658,317.84
  6. Step 6: Final answer
    x = 538,252.23

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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.