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Finding the Fourth Proportional to 451,646.67, 621,708.03 and 390,364.91

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Solution

The fourth proportional to 451,646.67, 621,708.03 and 390,364.91 is: 537,351.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,646.67 : 621,708.03 = 390,364.91 : x
  2. Step 2: Convert to fraction form
    451,646.67/621,708.03 = 390,364.91/x
  3. Step 3: Cross multiply
    451,646.67x = 621,708.03 × 390,364.91
  4. Step 4: Simplify right side
    451,646.67x = 242,692,996,068.69
  5. Step 5: Solve for x
    x = 242,692,996,068.69/451,646.67
  6. Step 6: Final answer
    x = 537,351.46

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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.