Home / 642,913.74-886,605.48-384,746.76

Finding the Fourth Proportional to 642,913.74, 886,605.48 and 384,746.76

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Solution

The fourth proportional to 642,913.74, 886,605.48 and 384,746.76 is: 530,582.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,913.74 : 886,605.48 = 384,746.76 : x
  2. Step 2: Convert to fraction form
    642,913.74/886,605.48 = 384,746.76/x
  3. Step 3: Cross multiply
    642,913.74x = 886,605.48 × 384,746.76
  4. Step 4: Simplify right side
    642,913.74x = 341,118,585,828.25
  5. Step 5: Solve for x
    x = 341,118,585,828.25/642,913.74
  6. Step 6: Final answer
    x = 530,582.20

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Double scale
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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.