Home / 685,749,734.19-946,413,138.65-384,416,432.91

Finding the Fourth Proportional to 685,749,734.19, 946,413,138.65 and 384,416,432.91

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Solution

The fourth proportional to 685,749,734.19, 946,413,138.65 and 384,416,432.91 is: 530,538,685.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,749,734.19 : 946,413,138.65 = 384,416,432.91 : x
  2. Step 2: Convert to fraction form
    685,749,734.19/946,413,138.65 = 384,416,432.91/x
  3. Step 3: Cross multiply
    685,749,734.19x = 946,413,138.65 × 384,416,432.91
  4. Step 4: Simplify right side
    685,749,734.19x = 363,816,762,817,068,160
  5. Step 5: Solve for x
    x = 363,816,762,817,068,160/685,749,734.19
  6. Step 6: Final answer
    x = 530,538,685.88

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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.